Zynga Poker Bot 2010 is the only working bot for zynga texas holdem poker.
It automates poker play on any table without any interaction from the user.
It is fully configurable, and can be tweaked to just the way you want it to play, you can tell it to raise on certain hands, fold call the same. You can tell it to go all in if it believes it has a certain percentage chance of winning at the showdown. You can tell it to only call or raise upto a defined amount of chips etc...
There are to many features to go into, if you have any questions about it, you can create a thread here to ask.